1
0-38. REMOVAL AND REPLACEMENT. (Refer to Paragraph 10-87 of this section.)
10-39. RATE OF CLIMB INDICATOR.
10-40. GENERAL. The rate of climb indicator measures the rate of change in static pressure when the airplane is
climbing or descending. By means of a pointer and dial, this instrument will indicate the rate of ascent or descent
of the airplane in feet per minute. But due to the lag of the instrument, the aircraft will be climbing or descending
before the instrument starts to read and the instrument will continue to read after the aircraft has assumed level
flight. In rough air this should not be considered a malfunction.
10-41. TROUBLESHOOTING.
TABLE X-IV. RATE OF CLIMB INDICATOR
Trouble
Cause
Remedy
Pointer does not set
Aging of diaphragm.
Reset pointer to zero by means of setting
on zero.
screw. Tap instrument while resetting.
Pointer fails to
Obstruction in static
Disconnect all instruments connected
respond.
line.
to the static line. Clear line
Pitot head frozen over.
Water in static line.
Check individual instruments for
obstruction in lines.
Obstruction in pitot head.
Clean lines and head.
Pointer oscillates.
Leaks in static lines.
Disconnect all instruments connected to
the static line. Check individual
instruments for leaks. Reconnect
instruments to static line and test
installation for leaks.
Defective mechanism.
Replace instrument.
Rate of climb indicates
Water in static line.
Disconnect static lines and blow out lines
when aircraft is banked.
from cockpit out to pitot head.
Pointer has to be set
Temperature compensator
Replace instrument.
before every flight.
inoperative.
Pointer cannot be reset
Diaphragm distorted.
Replace instrument.
to zero.
Instrument reads very
Case of instrument
Replace instrument.
low during climb or
broken or leaking.
descent.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
I N S T R U M E N T
2B23